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Chlorpyrifos (Lorsban) Revocation of Tolerances

We have received many questions about Lorsban in the last week. EPA has provided a prepublication version of the final rule which will revoke all food tolerances. Some changes are possible, but not likely. Upon publication, all food tolerances for chlorpyrifos will be cancelled 6 months later (again, some changes…
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Protecting Honey Bees While Controlling Spider Mites

I received a question this week about spraying for spider mites and protecting honey bees. First and foremost, spider mite problems are frequently a result of repeated application of broad-spectrum insecticides. Don’t apply these products without a specific need. That said, spider mites have become a more consistent problem in…
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Potential Options for Managing Frost-damage in Vegetable Crops (Coolong and Dutta) Because of the potential for an upcoming frost this week on newly planted vegetable transplants we are sure you are getting questions from concerned growers.  I have attached a link to a publication on frost and freeze protection https://secure.caes.uga.edu/extension/publications/files/pdf/B%201479_1.PDF  that,…
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Resistance to FRAC Group 11 fungicides (Quadris and Cabrio) in fungus causing cucurbit anthracnose in GA

We have detected insensitivity of Colletotrichum sp. (causal agent of anthracnose of cucurbits) to FRAC group 11 fungicides (Quadris and Cabrio) in multiple commercial fields in GA. Further confirmation in our lab indicated that 70 to 80% of the isolates are either highly resistant or moderately resistant to Quadris and Cabrio. These…
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Whitefly transmitted viruses – Fall 2020

The outlook for problems with whitefly transmitted viruses does not look good for fall 2020 vegetable crops. Several viruses were reported at low levels at the end of the spring crops and have already been detected in early fall crops/experiments. This combined with rapidly increasing whitefly populations (and continued hot,…
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